JP4854043B2 - Magnetic head assembly and magnetic disk drive - Google Patents

Magnetic head assembly and magnetic disk drive Download PDF

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JP4854043B2
JP4854043B2 JP2008256737A JP2008256737A JP4854043B2 JP 4854043 B2 JP4854043 B2 JP 4854043B2 JP 2008256737 A JP2008256737 A JP 2008256737A JP 2008256737 A JP2008256737 A JP 2008256737A JP 4854043 B2 JP4854043 B2 JP 4854043B2
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magnetic head
flexure
load beam
magnetic
magnetic disk
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JP2010086630A (en
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拓磨 木土
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Toshiba Storage Device Corp
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4826Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4833Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4853Constructional details of the electrical connection between head and arm
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/486Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly

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  • Supporting Of Heads In Record-Carrier Devices (AREA)

Description

本件は、磁気ディスクにアクセスする磁気ヘッドを備えた磁気ヘッドアセンブリ、およびその磁気ヘッドアセンブリを備えた磁気ディスク装置に関する。   The present invention relates to a magnetic head assembly including a magnetic head for accessing a magnetic disk, and a magnetic disk device including the magnetic head assembly.

磁気ディスク装置では、回転する磁気ディスク上に磁気ヘッドを微小隙間で浮上させて、磁気ディスクへの情報の記録および磁気ディスクからの情報の再生(これら記録と再生を合わせて、以下「アクセス」と称する)が行なわれる。磁気ディスク上に磁気ヘッドを微小隙間で安定的に浮上させて、浮上変動を起こさせないようにするために、磁気ヘッドを浮上方向とねじり方向には柔に支持し、一方、面内方向には剛に支持し、精密位置決めを実現するサスペンションと呼ばれる構造が採用されている。   In a magnetic disk apparatus, a magnetic head is levitated on a rotating magnetic disk with a small gap so that information is recorded on the magnetic disk and information is reproduced from the magnetic disk. Is called). In order to stably float the magnetic head on the magnetic disk with a small gap so as not to cause the floating fluctuation, the magnetic head is supported flexibly in the flying direction and the torsional direction, while in the in-plane direction. A structure called a suspension that is rigidly supported and achieves precise positioning is employed.

ここで、近年の磁気ディスクへの大容量高記録密度化に対応し、その大容量高記録密度を達成すべく磁気ヘッドの浮上量は10nm以下となり、磁気ディスクの高速回転に伴う空気流の外乱の影響は無視できないほど大きなものとなっている。近年の磁気ディスクのトラックピッチは0.3μm以下となってきており、ナノメータオーダの磁気ヘッド位置決め精度を要求されている磁気ディスク装置においては、空気流の影響により磁気ヘッドを搭載するサスペンションが振動して正確な位置決めを行うことが困難になり、オントラック不良(オフトラック)の原因となっている。   Here, in response to the recent increase in recording capacity of magnetic disks with a large capacity, the flying height of the magnetic head is 10 nm or less in order to achieve the large capacity and the high recording density. The effect of is so great that it cannot be ignored. In recent years, the track pitch of magnetic disks has become 0.3 μm or less, and in magnetic disk devices that require magnetic head positioning accuracy on the order of nanometers, the suspension mounting the magnetic head vibrates due to the influence of air flow. Therefore, it is difficult to perform accurate positioning, which causes on-track failure (off-track).

特に磁気ヘッドを直接に支持するフレキシャのジンバル部は、磁気ディスクの振れに追従すべく、浮上方向、ねじり方向に非常に柔な構造に設計されているにもかかわらず、磁気ヘッドの厚さが薄くなっていることもあって磁気ディスク表面に更に近づき、空気流の外乱(風外乱)の影響を益々受けやすくなってきている。   In particular, the gimbal part of the flexure that directly supports the magnetic head is designed to have a very flexible structure in the flying direction and torsional direction in order to follow the deflection of the magnetic disk. Since it is thinner, it gets closer to the magnetic disk surface and becomes more susceptible to the influence of airflow disturbance (wind disturbance).

このジンバル部の振動に対する対策が特許文献1に提案されている。この特許文献1では、フレキシャのジンバル部とロードビームの双方に対して、フレキシャ側から、もしくはロードビーム側から制振材を貼り付けることにより、フレキシャのジンバル部の振動を抑制している。   A countermeasure against the vibration of the gimbal portion is proposed in Patent Document 1. In Patent Document 1, vibration of the gimbal portion of the flexure is suppressed by attaching a vibration damping material to the gimbal portion of the flexure and the load beam from the flexure side or from the load beam side.

しかしながら、制振材をフレキシャ側から貼り付ける構造の場合、磁気ヘッドが薄型化されてきていることから、将来予測される磁気ヘッドの更なる薄型化に伴い、制振材と磁気ディスクが更に近づくため制振材も薄型化せざるを得ず、振動抑制効果が低減されてしまう結果となる。   However, in the case of a structure in which the damping material is attached from the flexure side, the magnetic head has been made thinner, so that the damping material and the magnetic disk will become closer as the magnetic head is further thinned in the future. For this reason, the damping material must also be thinned, resulting in a reduction in the vibration suppressing effect.

一方、制振材をロードビーム側から貼り付ける構造の場合、特許文献1では、フレキシャをロードビームよりも幅広としロードビームの両側に食み出させてロードビーム側から制振材を貼り付けており、この構造の場合十分な厚さの制振材を用いることができるものの、フレキシャをロードビームよりも幅広とする必要があることからフレキシャのジンバル部を柔な構造とするのが難しい。また、ロードビームは軽量化のために、その幅方向両側をフレキシャとは逆の側に折り曲げたレールを形成した構造を採用した場合、フレキシャを幅広に形成してもそのレールが邪魔となってロードビーム側からレール越しにフレキシャにダンパーを貼り付けることは困難である。制振材を貼り付けるためにレールを部分的に分離することも考えられるが、ロードビームの他の振動モードを悪化させる可能性があり得策ではない。   On the other hand, in the case of a structure in which the damping material is pasted from the load beam side, in Patent Document 1, the flexure is made wider than the load beam and protrudes to both sides of the load beam, and the damping material is pasted from the load beam side. In this structure, although a damping material having a sufficient thickness can be used, it is difficult to make the gimbal portion of the flexure flexible because the flexure needs to be wider than the load beam. Also, to reduce the weight of the load beam, if a structure is formed in which the rail is bent on both sides in the width direction opposite to the flexure, the rail will be an obstacle even if the flexure is made wider. It is difficult to attach a damper to the flexure over the rail from the load beam side. Although it is conceivable to partially separate the rails in order to attach the damping material, it may deteriorate other vibration modes of the load beam, which is not possible.

また、もう一つの課題として、磁気ヘッドの小型化、薄型化に伴い、フレキシャのジンバル部には更に柔な構造が要求されており、柔な構造を追求すると、暴走時やロード/アンロード時の繰り返し応力に対する耐力の低下が予想される。この応力に対する耐力が低いと、フレキシャの配線に断線が生じ不良の原因となる。インナ側(磁気ディスクの回転中心側)のストッパへの衝突時は空気膜剛性によって磁気ヘッドの変位は極めて小さく、したがってジンバル部に生じる応力も小さいが、アウタ側(磁気ディスクの半径方向外側)のストッパへの衝突時は磁気ヘッドへの拘束はなく、ロール方向の変形により大きな応力が発生する。   Another issue is that with the miniaturization and thinning of magnetic heads, flexure gimbals require a more flexible structure. When pursuing a flexible structure, runaway and load / unload operations are required. It is expected that the proof stress against the repeated stress is reduced. If the proof strength against this stress is low, the flexure wiring will be disconnected and cause a failure. At the time of collision with the stopper on the inner side (rotation center side of the magnetic disk), the displacement of the magnetic head is extremely small due to the rigidity of the air film, and therefore the stress generated in the gimbal part is also small, but on the outer side (radial outside of the magnetic disk) At the time of collision with the stopper, there is no restriction on the magnetic head, and a large stress is generated by deformation in the roll direction.

特許文献2には、ピボット周りに板バネを設け、面外方向への変位を可とし暴走時のヘッドとディスクの衝突を防ぐキャリッジ構造が開示され、特許文献3にはキャリッジに二つの突出部を設け、その間にストッパを配置し、1つのストッパにてインナ/アウタに対する暴走を規制するキャリッジ構造が開示され、特許文献4にはシンバルアームをかんじき状に配置し、面内方向の衝撃を吸収する構造が開示され、特許文献5にはロードビームにくびれとスライダ裏面部にルーフを設け、落下衝撃時のリミッタを有する構造が開示されている。
特開2006−221726号公報 特開2005−267715号公報 特開2005−267716号公報 特開平10−11929号公報 特開平11−066781号公報
Patent Document 2 discloses a carriage structure in which a leaf spring is provided around a pivot so as to allow displacement in an out-of-plane direction and prevent collision between the head and the disk during runaway. Patent Document 3 discloses two protrusions on the carriage. A carriage structure is disclosed in which a stopper is disposed between the two and a carriage that restricts runaway against the inner / outer with a single stopper. Patent Document 4 arranges a cymbal arm like a handle and absorbs impact in the in-plane direction. Patent Document 5 discloses a structure in which a load beam is constricted and a roof is provided on the back surface of the slider, and a limiter for a drop impact is provided.
JP 2006-221726 A JP 2005-267715 A JP 2005-267716 A Japanese Patent Laid-Open No. 10-11929 Japanese Patent Laid-Open No. 11-066781

本件開示の磁気ヘッドアセンブリおよび磁気ディスク装置の課題は、フレキシャのジンバル部の柔軟な構造を維持しつつ、風外乱に対して安定し、かつ発生応力の低減を図ることにある。   An object of the magnetic head assembly and the magnetic disk apparatus disclosed in the present disclosure is to be stable against wind disturbance and to reduce generated stress while maintaining a flexible structure of the gimbal portion of the flexure.

本件開示の磁気ヘッドアセンブリは、
磁気ヘッドと、
磁気ヘッドを支持するタング部と、タング部に接続されタング部両側を通りタング部後方に回り込んで互いに接続された、タング部を支持する一対のアーム部と、一対のアーム部が互いに接続された接続部と、その接続部後方において幅方向に括れた括れ部とを有し、括れ部よりもさらに後方に延在して磁気ヘッドに接続される配線を導くフレキシャと、
第1面側にフレキシャを支持して前後方向に延在し、フレキシャの、タング部よりも後方の一部分を覗かせる開口を有するロードビームと、
ロードビームの第2面側から、ロードビームおよび、開口から覗くフレキシャの双方に跨って配置された制振部材とを備え
ロードビームは、開口として、括れ部の幅方向について括れ部全幅を覗かせるとともに、前後方向について、少なくとも、括れ部と接続部との境界領域を覗かせる位置および寸法の開口を有する。
The magnetic head assembly disclosed herein is:
A magnetic head;
A tongue portion that supports the magnetic head, a pair of arm portions that are connected to the tongue portion, pass through both sides of the tongue portion, wrap around the tongue portion and are connected to each other, and a pair of arm portions are connected to each other A flexure that leads the wiring connected to the magnetic head by extending further rearward than the constricted portion, and a constricted portion constricted in the width direction behind the connecting portion,
A load beam that supports the flexure on the first surface side and extends in the front-rear direction, and has an opening through which a portion of the flexure can be seen behind the tongue portion;
From the second surface side of the load beam, provided with a damping member disposed across both the load beam and the flexure peeked from the opening ,
Load beam, the opening, with peep constricted portion full width in the width direction of the constricted portion, the front-rear direction, at least, that having a opening position and dimensions peep the boundary region between the connecting portion and the constricted portion.

本件開示の磁気ヘッドアセンブリは、ロードビームに上記の開口を形成して、ロードビームと、その開口から覗くフレキシャとの双方に跨って制振材を配置したものであり、フレキシャを幅広にして柔軟性が削がれることを防止した上で、制振材配置により外乱に対する安定性が保たれる。この制振材はロードビーム側に配置されるものであり、厚みの制限は緩く、十分な制振性能を確保することができる。   The magnetic head assembly according to the present disclosure is formed by forming the opening in the load beam and disposing the vibration damping material across both the load beam and the flexure viewed from the opening. In addition, the stability against disturbance is maintained by the arrangement of the damping material. This damping material is arranged on the load beam side, and the thickness is not limited so that sufficient damping performance can be ensured.

また、本件開示の磁気ヘッドアセンブリは、フレキシャに上記の括れ部を形成したため、その括れ部からロール方向へねじれることで発生応力が低減され、フレキシャの配線の断線が防止される。   Further, in the magnetic head assembly of the present disclosure, since the above-described constricted portion is formed in the flexure, the generated stress is reduced by twisting in the roll direction from the constricted portion, and disconnection of the flexure wiring is prevented.

また、本件開示の磁気ディスク装置は、本件開示の磁気ヘッドアセンブリと、回転駆動され、磁気ヘッドアセンブリを構成する磁気ヘッドにより情報の磁気的な記録および読出しを受ける磁気ディスクとを備えている。   The magnetic disk device of the present disclosure includes the magnetic head assembly of the present disclosure, and a magnetic disk that is rotationally driven and receives magnetic recording and reading of information by the magnetic head constituting the magnetic head assembly.

本件開示の磁気ヘッドアセンブリおよび磁気ディスク装置によれば、フレキシャ先端のジンバル部の柔軟性を確保した上で、風外乱に対する振動の抑制および発生応力の低減が図られる。   According to the magnetic head assembly and the magnetic disk device of the present disclosure, it is possible to suppress vibration against wind disturbance and reduce generated stress while ensuring the flexibility of the gimbal portion at the tip of the flexure.

以下、本件の実施形態について説明する。   Hereinafter, an embodiment of the present case will be described.

図1は、磁気ディスク装置の概要図である。   FIG. 1 is a schematic diagram of a magnetic disk device.

この図1に示す磁気ディスク装置10のハウジング101には、回転軸102に装着されて回転する磁気ディスク20と、磁気ディスク20に対して情報の記録および再生(アクセス)を行なう磁気ヘッド301を先端に保持した磁気ヘッドアセンブリ30と、この磁気ヘッドアセンブリ30が固着されアーム軸105を中心に磁気ディスク20の表面に沿って移動するキャリッジアーム106と、キャリッジアーム106を駆動するアームアクチュエータ107とが収納されている。   In the housing 101 of the magnetic disk apparatus 10 shown in FIG. 1, a magnetic disk 20 mounted on a rotating shaft 102 and rotating, and a magnetic head 301 for recording and reproducing (accessing) information to and from the magnetic disk 20 are provided at the tip. The magnetic head assembly 30 held by the magnetic head assembly 30, the carriage arm 106 to which the magnetic head assembly 30 is fixed and moved along the surface of the magnetic disk 20 around the arm shaft 105, and the arm actuator 107 that drives the carriage arm 106 are housed. Has been.

磁気ディスク20は、情報を担持する磁場の印加を受けて情報を磁気的に記録する。磁気ディスク20への情報の記録および磁気ディスク20に記録された情報の再生に当たっては、アームアクチュエータ107によってキャリッジアーム106が駆動されて、磁気ヘッド301が、回転する磁気ディスク20上の所望のトラックに位置決めされる。そして、この磁気ヘッド301は、磁気ディスク20の回転に伴って、磁気ディスク20の所望のトラックをなぞって情報を順次に記録する。   The magnetic disk 20 magnetically records information in response to application of a magnetic field carrying information. When recording information on the magnetic disk 20 and reproducing information recorded on the magnetic disk 20, the carriage arm 106 is driven by the arm actuator 107, and the magnetic head 301 moves to a desired track on the rotating magnetic disk 20. Positioned. The magnetic head 301 sequentially records information by tracing a desired track of the magnetic disk 20 as the magnetic disk 20 rotates.

アームアクチュエータ107は、磁気ディスク20のアクセスにあたり磁気ヘッド301を磁気ディスク20の上に回動させ(ロード)、磁気ディスクのアクセスが不要なときは、磁気ヘッド301をランプ108の位置まで回動させて休止させる(アンロード)。   The arm actuator 107 rotates (loads) the magnetic head 301 onto the magnetic disk 20 when accessing the magnetic disk 20, and rotates the magnetic head 301 to the position of the ramp 108 when access to the magnetic disk is unnecessary. To pause (unload).

また、図示は省略するが、この磁気ディスク装置10には、インナ側(矢印A側)に回動し過ぎようとしたときにキャリッジアーム106が当接してインナ側への暴走を防止するインナ側ストッパと、アウタ側(矢印B側)に回動し過ぎようとしたときにキャリッジアーム106が当接してアウタ側への暴走を防止するアウタ側ストッパが備えられている。   Although not shown, the magnetic disk device 10 has an inner side that prevents the runaway to the inner side by the carriage arm 106 coming into contact with the inner side (arrow A side) when it tries to rotate too much. A stopper and an outer stopper for preventing the runaway to the outer side by contacting the carriage arm 106 when it is going to rotate too much on the outer side (arrow B side) are provided.

図2は、図1に示す磁気ディスク装置を構成する磁気ヘッドアセンブリの斜視図である。この図2では、図1に示す磁気ヘッドアセンブリ30とは裏向きに、磁気ディスク20(図1参照)に対面する側を上向きにして示してある。   FIG. 2 is a perspective view of the magnetic head assembly constituting the magnetic disk apparatus shown in FIG. 2, the side facing the magnetic disk 20 (see FIG. 1) is shown facing upward from the magnetic head assembly 30 shown in FIG.

この磁気ヘッドアセンブリ30には、図1に示すキャリッジアーム106の先端にかしめ固定される穴311aが設けられたベースプレート311と、バネ性を有するヒンジ312を介してベースプレート311に接続されたロードビーム313を有する。このロードビーム313は前後方向に延び後端がヒンジ312に接続され、前端には、アンロード時にランプ108(図1参照)に支持されるリフトタブ313bが形成されている。また、このロードビーム313は、その幅方向両側が図2の下側(磁気ディスク20(図1参照)から離れる側、すなわちロードビーム313の、後述する第1面側に対する裏側である第2面側)に折り曲げられてレール313aが形成されている。ロードビーム313はこのレール313aにより剛性が増し、したがってそのロードビーム313の板厚を薄くし軽量化が図られている。   The magnetic head assembly 30 includes a base plate 311 provided with a hole 311a that is caulked and fixed to the tip of the carriage arm 106 shown in FIG. 1, and a load beam 313 connected to the base plate 311 via a hinge 312 having a spring property. Have The load beam 313 extends in the front-rear direction, and a rear end is connected to the hinge 312. A lift tab 313b supported by the ramp 108 (see FIG. 1) at the time of unloading is formed at the front end. Further, the load beam 313 has both sides in the width direction on the lower side in FIG. 2 (the side away from the magnetic disk 20 (see FIG. 1), that is, the second side which is the back side of the load beam 313 with respect to the first side described later. The rail 313a is formed by being bent to the side. The rigidity of the load beam 313 is increased by the rail 313a. Therefore, the plate thickness of the load beam 313 is reduced to reduce the weight.

また、このロードビーム313には、その第1面側、すなわち磁気ディスク20(図1参照)に面する側に、フレキシャ32が支持されている。このフレキシャ32は、ロードビーム313が延びる方向と同一の前後方向に延び、ステンレス製の薄板からなる母材321と、その母材321に支持されたフレキシブル基板322とからなり、フレキシブル基板322は、母材321側の絶縁層と、母材321との間にその絶縁層を挟んで配置された、磁気ヘッド301に接続される配線322aと、その配線322aを絶縁層との間に挟む保護層とで形成されている。この保護層は部分的には形成されておらず、配線322aが見えている。   A flexure 32 is supported on the load beam 313 on the first surface side, that is, on the side facing the magnetic disk 20 (see FIG. 1). The flexure 32 includes a base material 321 made of a thin plate made of stainless steel and a flexible substrate 322 supported by the base material 321, and extends in the same longitudinal direction as the direction in which the load beam 313 extends. A wiring 322a connected to the magnetic head 301, which is disposed between the insulating layer on the base material 321 side and the base material 321, and the protective layer that sandwiches the wiring 322a between the insulating layer. And is formed. This protective layer is not partially formed, and the wiring 322a can be seen.

磁気ヘッド301は、円Rで示す、フレキシャ32の先端部分に搭載されており、その先端部分はジンバルと称される。   The magnetic head 301 is mounted on a tip portion of the flexure 32 indicated by a circle R, and the tip portion is referred to as a gimbal.

図3は、フレキシャの、ジンバルを構成する先端部分における1次のネジレモードを示す斜視図である。   FIG. 3 is a perspective view showing a primary torsion mode at a tip portion of the flexure constituting the gimbal.

フレキシャ32の先端部分には、磁気ヘッド301(図2参照)を支持するタング部323、そのタング部323に接続されそのタング部両側を通りタング部後方に回り込んで互いに接続された一対のアーム部324、それら一対のアーム部324が互いに接続された接続部325、および、その接続部325の後方において幅方向に括れた括れ部326を有する。ここで、タング部323には、この図3に示されている面に対する裏面に磁気ヘッドが搭載される。   At the tip of the flexure 32 is a tongue portion 323 that supports the magnetic head 301 (see FIG. 2), a pair of arms connected to the tongue portion 323, passing through both sides of the tongue portion, and wrapping around the tongue portion. A connection portion 325 in which the pair of arm portions 324 are connected to each other, and a constricted portion 326 that is constricted in the width direction behind the connection portion 325. Here, in the tongue portion 323, a magnetic head is mounted on the back surface with respect to the surface shown in FIG.

一点鎖線は変形前のアーム部324を示しており、アーム部324は磁気ヘッドが磁気ディスクのうねりに追従できるように図示のように柔軟に変形する構造となっている。
また、ここに示す例では、一対のアーム部324を構成する左右それぞれのアーム部324がさらに2本ずつのアーム324a,324bに分かれており、柔軟性をさらに増している。
The alternate long and short dash line indicates the arm portion 324 before deformation, and the arm portion 324 is structured to be flexibly deformed as shown so that the magnetic head can follow the undulation of the magnetic disk.
Further, in the example shown here, the left and right arm portions 324 constituting the pair of arm portions 324 are further divided into two arms 324a and 324b, further increasing flexibility.

また、タング部323の後端には、そのタング部323に対し立設したリミッタ327が設けられている。このリミッタ327は、図2に示すロードビーム313の開口313c(図2,図4参照)に係止されフレキシャ先端部分に衝撃等が伝わったときに、タング部323に搭載された磁気ヘッド301がロードビーム313から離れてしまうのを防止している。また、このフレキシャ32には括れ部326が形成されており、アウタ側ストッパへの衝突時にはその括れ部326からロール方向へねじれることで発生応力が低減され、一対のアーム部324の部分の配線322aの断線等が回避される。   Further, a limiter 327 is provided at the rear end of the tongue portion 323 so as to stand up to the tongue portion 323. The limiter 327 is locked to the opening 313c (see FIGS. 2 and 4) of the load beam 313 shown in FIG. 2, and when a shock or the like is transmitted to the tip of the flexure, the magnetic head 301 mounted on the tongue 323 is The separation from the load beam 313 is prevented. Further, the flexure 32 is formed with a constricted portion 326, and at the time of a collision with the outer side stopper, the generated stress is reduced by twisting in the roll direction from the constricted portion 326, and the wiring 322a of the pair of arm portions 324 is formed. Disconnection etc. are avoided.

図2に戻って、図2の説明を補足する。   Returning to FIG. 2, the explanation of FIG. 2 will be supplemented.

フレキシャ32を構成するフレキシブル基板322は、括れ部326では母材321の幅よりも狭幅であって、母材321の内側に位置し、したがってその括れ部326の配線322aは母材321の内側を通っている。また、この配線322aは括れ部326から一対のアーム部324を通り磁気ヘッド301に接続されている。一対のアーム部324は、左右それぞれについて2本ずつのアーム324a,324bに分かれているが、配線322aは、それら左右2本ずつのアーム324a,324bうちの内側のアーム324aに支持されている。   The flexible substrate 322 constituting the flexure 32 is narrower than the width of the base material 321 in the constricted portion 326, and is located inside the base material 321. Therefore, the wiring 322 a of the constricted portion 326 is located inside the base material 321. Through. The wiring 322 a is connected to the magnetic head 301 from the constricted portion 326 through the pair of arm portions 324. The pair of arm portions 324 are divided into two arms 324a and 324b on the left and right sides, respectively, but the wiring 322a is supported by the inner arm 324a of the two arms 324a and 324b on the left and right sides.

ロードビーム313には、フレキシャ32のタング部323よりも後方の一部をロードビーム313の第2面側に覗かせる開口313cが形成されている。具体的には、この開口313cは、フレキシャ32の括れ部326と、一対のアーム部324が互いに接続された接続部325との境界領域を覗かせる位置に形成され、その開口313cの幅は括れ部326の全幅よりも広く、幅方向について括れ部全幅を覗かせている。また、この開口313cは、さらに前方に広がり、この開口313aの前端部分にリミッタ部327が係止されている。   The load beam 313 is formed with an opening 313 c that allows a portion of the flexure 32 behind the tongue portion 323 to be viewed on the second surface side of the load beam 313. Specifically, the opening 313c is formed at a position where a boundary region between the constricted portion 326 of the flexure 32 and the connecting portion 325 where the pair of arm portions 324 are connected to each other can be seen, and the width of the opening 313c is constricted. It is wider than the full width of the portion 326, and the full width of the constricted portion is seen in the width direction. The opening 313c further extends forward, and a limiter portion 327 is locked to the front end portion of the opening 313a.

図4は、本実施形態の磁気ヘッドアセンブリの先端部分の、それぞれ磁気ヘッド側(磁気ディスク側)から見た平面図(A)、およびその裏面側から見た平面図(B)である。   FIG. 4 is a plan view (A) of the tip portion of the magnetic head assembly of the present embodiment as viewed from the magnetic head side (magnetic disk side) and a plan view (B) as viewed from the back side thereof.

また、図5は、比較例としての従来の磁気ヘッドアセンブリの先端部分の、それぞれ磁気ヘッド側(磁気ディスク側)から見た平面図(A)、およびその裏面側から見た平面図である。尚、この図5の比較例においても、本実施形態との比較の容易のため、対応する要素には形状の相違があっても同一の符号を付して示してある。   FIG. 5 is a plan view (A) of the tip portion of a conventional magnetic head assembly as a comparative example viewed from the magnetic head side (magnetic disk side) and a plan view viewed from the back side thereof. In the comparative example of FIG. 5 as well, for the sake of easy comparison with the present embodiment, corresponding elements are denoted by the same reference numerals even if they have different shapes.

図4に示す実施形態では、ロードビーム313の第2面側に制振材35が貼付されている。この制振材35は、ロードビーム313に形成された開口313cの一部にまで広がり、その開口313cから覗いた、フレキシャ32の括れ部326および接続部325にもその制振材35が貼付されている。この制振材35の貼付により、風外乱等を受けても余計な振動が抑えられ、磁気ヘッド301が柔軟にかつ安定的に支持される。   In the embodiment shown in FIG. 4, a damping material 35 is attached to the second surface side of the load beam 313. The damping material 35 extends to a part of the opening 313c formed in the load beam 313, and the damping material 35 is also affixed to the constricted portion 326 and the connecting portion 325 of the flexure 32 as seen from the opening 313c. ing. By applying the vibration damping material 35, excessive vibration is suppressed even when subjected to wind disturbance or the like, and the magnetic head 301 is supported flexibly and stably.

図5に示す従来例では、ロードビーム313の開口313cはリミッタ327の係止のためだけに形成されていて制振材35とは無関係であり、制振材35はロードビーム313にのみ貼付されていてフレキシャ32には貼付されていない。このため、フレキシャ32は風外乱の影響を大きく受けることになる。ここで、図5に示す従来例において、制振材35の幅をロードビーム313の幅よりも広げ、また必要によってはフレキシャ32の幅もさらに広げ、フレキシャ32の、ロードビーム313よりも幅方向に食み出した部分に制振材35を貼付しようとしても、ロードビーム313の両側縁にはレール313aが形成されているため、そのレール313aを乗り越えて制振材35を貼付するには構造上無理がある。また、前述したようにフレキシャ32側(図6(A)に示す側)から制振材を貼付しようとすると、磁気ヘッド301の薄型化によりその制振材の厚さが制限を受け、十分な制振作用を得ることが難しい。   In the conventional example shown in FIG. 5, the opening 313 c of the load beam 313 is formed only for locking the limiter 327 and is irrelevant to the damping material 35, and the damping material 35 is attached only to the load beam 313. And is not attached to the flexure 32. For this reason, the flexure 32 is greatly affected by wind disturbance. Here, in the conventional example shown in FIG. 5, the width of the damping material 35 is wider than the width of the load beam 313, and if necessary, the width of the flexure 32 is further widened, so that the flexure 32 is wider than the load beam 313. Even if it tries to stick the damping material 35 to the part which protruded, since the rail 313a is formed in the both-sides edge of the load beam 313, it is a structure in order to stick over the rail 313a and stick the damping material 35 It is impossible. Further, as described above, if the damping material is applied from the side of the flexure 32 (the side shown in FIG. 6A), the thickness of the damping material is limited due to the thinning of the magnetic head 301, and sufficient. It is difficult to obtain a damping effect.

本実施形態では、図4に示すように、ロードビーム313に、フレキシャ32を覗かせる開口313cを形成し、その開口313cを通してフレキシャ32にも制振材35を貼り付けることで、フレキシャ32の振動を抑えている。   In the present embodiment, as shown in FIG. 4, the load beam 313 is formed with an opening 313c through which the flexure 32 can be seen, and the vibration damping material 35 is attached to the flexure 32 through the opening 313c. Is suppressed.

また、本実施形態ではフレキシャ32に括れ部326を形成したため、衝撃を受けたときにその括れ部326がねじれることで一対のアーム部324上の配線322aの変形が抑制され、配線322aの断線等の発生が抑制される。   Further, in this embodiment, since the constricted portion 326 is formed in the flexure 32, the constricted portion 326 is twisted when receiving an impact, so that the deformation of the wiring 322a on the pair of arm portions 324 is suppressed, and the wiring 322a is disconnected. Is suppressed.

これに対し図5に示す従来例の場合、本実施形態のような括れ部326は存在せず、したがって衝撃を受けたとき、その衝撃が一対のアーム部324を大きく変形させ、そのアーム部324の配線322aに大きな応力がかかり、断線等の発生の原因となる。   On the other hand, in the case of the conventional example shown in FIG. 5, the constricted portion 326 as in the present embodiment does not exist. Therefore, when an impact is received, the impact greatly deforms the pair of arm portions 324, and the arm portions 324 A large stress is applied to the wiring 322a, causing disconnection or the like.

以上のように、本実施形態ではフレキシャ32に括れ部326を形成したこと、およびロードビーム313側から開口313cを通じてフレキシャ32の括れ部326および接続部325に制振材35を貼付したことから、磁気ヘッド301が柔軟かつ安定的に支持され、配線の断線も防止される。   As described above, in the present embodiment, the constricted portion 326 is formed on the flexure 32, and the damping material 35 is attached to the constricted portion 326 and the connecting portion 325 of the flexure 32 through the opening 313c from the load beam 313 side. The magnetic head 301 is supported flexibly and stably, and disconnection of wiring is prevented.

磁気ディスク装置の概要図である。1 is a schematic diagram of a magnetic disk device. 図1に示す磁気ディスク装置を構成する磁気ヘッドアセンブリの斜視図である。FIG. 2 is a perspective view of a magnetic head assembly constituting the magnetic disk device shown in FIG. 1. フレキシャの、ジンバルを構成する先端部分における1次のネジレモードを示す斜視図である。It is a perspective view which shows the primary torsion mode in the front-end | tip part which comprises a gimbal of a flexure. 本実施形態の磁気ヘッドアセンブリの先端部分の平面図である。It is a top view of the front-end | tip part of the magnetic head assembly of this embodiment. 比較例としての従来の磁気ヘッドアセンブリの先端部分の平面図である。It is a top view of the front-end | tip part of the conventional magnetic head assembly as a comparative example.

符号の説明Explanation of symbols

10 磁気ディスク装置
20 磁気ディスク
30 磁気ヘッドアセンブリ
32 フレキシャ
35 制振材
326 括れ部
101 ハウジング
102 回転軸
105 アーム軸
106 キャリッジアーム
107 アームアクチュエータ
108 ランプ
301 磁気ヘッド
311 ベースプレート
312 ヒンジ
313 ロードビーム
313a レール
313b リフトタブ
313c 開口
321 母材
322 フレキシブル基板
322a 配線
323 タング部
324 アーム部
325 接続部
327 リミッタ
DESCRIPTION OF SYMBOLS 10 Magnetic disk apparatus 20 Magnetic disk 30 Magnetic head assembly 32 Flexure 35 Damping material 326 Constriction part 101 Housing 102 Rotating shaft 105 Arm shaft 106 Carriage arm 107 Arm actuator 108 Lamp 301 Magnetic head 311 Base plate 312 Hinge 313 Load beam 313a Rail 313b Lift tab 313c opening 321 base material 322 flexible substrate 322a wiring 323 tongue 324 arm 325 connection 327 limiter

Claims (4)

磁気ヘッドと、
前記磁気ヘッドを支持するタング部と、該タング部に接続され該タング部両側を通り該タング部後方に回り込んで互いに接続されて該タング部を支持する一対のアーム部と、
該一対のアーム部が互いに接続された接続部と、該接続部の後方において幅方向に括れた括れ部とを有し、該括れ部よりもさらに後方に延在して前記磁気ヘッドに接続される配線を導くフレキシャと、
第1面側にフレキシャを支持して前後方向に延在し、該フレキシャの、前記タング部よりも後方の一部分を覗かせる開口を有するロードビームと、
前記ロードビームの第2面側から、該ロードビームおよび、前記開口から覗く前記フレキシャの双方に跨って配置された制振部材とを備え
前記ロードビームは、前記開口として、前記括れ部の幅方向について該括れ部全幅を覗かせるとともに、前後方向について、少なくとも、該括れ部と前記接続部との境界領域を覗かせる位置および寸法の開口を有することを特徴とする磁気ヘッドアセンブリ。
A magnetic head;
A tongue portion that supports the magnetic head, and a pair of arm portions that are connected to the tongue portion, pass through both sides of the tongue portion, wrap around the tongue portion, and are connected to each other to support the tongue portion;
A connecting portion in which the pair of arm portions are connected to each other; and a constricted portion that is constricted in the width direction behind the connecting portion, and extends further rearward than the constricted portion and is connected to the magnetic head. A flexure that guides the wiring
A load beam that supports the flexure on the first surface side and extends in the front-rear direction, and has an opening through which a portion of the flexure can be seen rearward of the tongue portion;
A vibration damping member disposed across both the load beam and the flexure viewed from the opening from the second surface side of the load beam ,
The load beam has an opening having a position and a size allowing the entire width of the constricted portion to be viewed in the width direction of the constricted portion and the boundary region between the constricted portion and the connecting portion in the front-rear direction. a magnetic head assembly, comprising a.
前記ロードビームが、該ロードビームの幅方向両側に、前記第2面側に立設して前後方向に延在するレール部を有することを特徴とする請求項1記載の磁気ヘッドアセンブリ。 The load beam, on both sides in the width direction of the load beam, claim 1 Symbol mounting of the magnetic head assembly and having a rail portion extending in the longitudinal direction standing on the second surface side. 前記フレキシャは、金属製の板形状を有する母材と、前記配線を有し前記母材上に搭載されたフレキシブル基板とからなり、前記フレキシブル基板は、少なくとも前記括れ部では、幅方向について、前記母材の幅よりも狭幅であって、該母材の内側に位置するものであることを特徴とする請求項1又は2記載の磁気ヘッドアセンブリ。 The flexure is composed of a base material having a metal plate shape and a flexible substrate having the wiring and mounted on the base material, and the flexible substrate is at least in the narrowed portion with respect to the width direction. a narrower than the width of the base material, the magnetic head assembly according to claim 1 or 2, characterized in that positioned inside the base material. 請求項1からのうちいずれか1項記載の磁気ヘッドアセンブリと、
回転駆動され前記磁気ヘッドにより情報の磁気的な記録および読出しを受ける磁気ディスクとを備えたことを特徴とする磁気ディスク装置。
A magnetic head assembly according to any one of claims 1 to 3 ,
A magnetic disk device comprising: a magnetic disk that is rotationally driven and receives magnetic recording and reading of information by the magnetic head.
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